Haruko Ueki (植木 春子, Ueki Haruko) was Kōsuke Ueki's adoptive mother. She died in a car accident the same day Ueki arrived on Earth. She is the first person God meets while on a trip on Earth twenty-five years before when he is a newly elected god, when she was a high school student. Her maiden surname is Ueki and she mentions that she has a boyfriend who is a writer, which is also Gengoro's occupation. Her daughter is her spitting image with the exception that Haruko wears her hair in a ponytail. In fact, God was inspired to create the Tournament due to the actions of Haruko.